Flexible tubing.



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G, M. AND' ELEXIBL APPLIGATIOH TELED onrTnn sTATns GUSTAF M. ANDERSSON,HYDE PARK, MASSACHUSETTS, ASSTGNOR OF ONE-HALF TO FRANK H. KASPERSON, OFHYDE PARK, MASSA- GHUSETTS.

Specification of Letters Fatent.

FLEXHBLE TUBlNG.

-patented Get. 2, 1906.

Application filed September l, 1904-.. Serial No. 222,970.

To all when@ it 11i/ay concern:

it knownthat LGUsTAFh/LANDERSSON, l the cup 9 is a concaved washer 10,which is a citizen of the United States, and a resident l pressed.tightly against said portion 9, and

consequently draws the parts 8 and 9 toof Hyde Parkjin the count-y ofbiorfolk and State of Massachusetts, have invented a new and ImprovedFlexible Tubing, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in flexible metal tubing andcouplings therefor,

the object being to provide a tubing coinble tubing embodying myinvention.

prising a plurality of sections 0r joints held iexibly together by meansof a spiral spring the coils of which engage in spiral channels formedin certain of the sections orjoints, whereby longitudinal pressure isexerted to l hold the ends of the sections or joints closely together,

I will describe a flexible tubing embodying my invention and then 'ointout the novel features in the appende claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding dparts in both figures.

Figure 1 is a longitu inal section of a iiexi- Fig. 2 is a longitudinalsection showing a modification.

Referring first to the example of my improvement shown in Fig. 1, theflexible tubing comprises long tubular sections 1 alternating with shorttubular sections 2; The sections 1 are round ed or convexed at the end,and these ends are seatedin the concaved ends of the short sections,thus permitting the sections to swing freely in all directions. Thesesections may be made of any suitable material-such, for instance, asnictalwand, if desired, packing rings 3 may be Varranged between thejoints of the sections. The coiled spring 4 extends through the tubularsections, and the short sections 2 are provided with interiorspirally-disposed channels 5, which receive coils of the spring,causin(T an interlock between the parts, and obvio uffy by turningtheshort sections on the spiralspring the joint connections between theseveral sections may be tightened.

I have shown a coupling-section between the flexible tubing and a pipe(i. This joint consists of a tube 7,`having a hemispherical portion 8engaging in a correspondinglysha pe d cu p il on the pipe (3.Surrounding the "receiving the end coils of the spring.

n Fig. 2 the tubing is formed of long sections 14 and short sections 15,the ends of the sections 14 being concaved to receive the convexed endsof the sections 15. Certain of the long sections at intervals along the.tubing are provided -with spiral channels 16 to receive the end coilsof spiral springs 17, which extend. around the outer side of the severalsections, these springs serving the same purpose as the spring firstdescribed, and by rotating the sections having the channels the jointsmay be tightened, as before mentioned. The end of one spring 17 has itscoils engaged in a spiral channel 18, formed in a couplingsection 19,having a rounded head 2() for engaging the wall of an opening in a pipe21. The head 20 is held tightly against its seat, but permitted to move,by means of a bolt 22, passing through. an opening in the pipe 21opposite the opening receiving the head 20, and the inner end of thisbolt has a link connection 23 with a cross-pin 24 in thecouplingsection. Engaging around the bolt at the outer side of the pipe21 and bearing at one end against said pipe and at the other end againsta nut 25 on the bolt is a spring 26.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A tubing comprising a plurality of sectionsengaging at the ends one with another,

I tube 7 and engaging with the outer surface ci 55 certain of saidsections intermediate of the IOO several sections yieldingly togethei`the said interlocking eoil portions being intermediate of the endsections.

8. A flexible tubing comprising a plurality of sections engagingsections intermediate of the end sections be-A ing spirally channeled inthe inner side,and a spiral spring extended through the severa` sectionsand having coils engaging in said` channels.

4. A flexible metal tubing comprising la end to end, certain of saidsneeze plurality of sections having abutting ends,l and a springextended alon the sections and y,having coiled portions inter ockingwith cei'- I5 e tain of the sections intermediate of the end Sections. vy

.In testimony whereof l have signed my naine to this speciiicetion inthe pi'esence of two subscribin Witnesses.

G STAF M. ANDERSSON. Witnesses:

CHARLES W, HILLS, EDWARD G. MAQILROY.

